9
START-UP (continued)
CALIBRATE THE TDS (TOTAL DISSOLVED SOLIDS) SENSOR (EC 1000 PPM solution required)
3
Fill one cup with water and one
cup with EC 1000 PPM solution
4
Gently wash the TDS probe
in the cup of water and dry with
the cloth.
5
Gently swish the probe in EC
PPM solution and, while swishing
the probe, enter the calibration
screen.
water
EC
PPM
water
EC
PPM
A
B
C
D
E
Fig. 1
Access the
water reservoir
1
Remove the lower grow drawer(s) to access the reservoir (Fig.1)
2
Locate the TDS sensor probe on the left side of the reservoir
(Fig.2)
Fig. 2
TDS sensor
(black)
6
To enter the TDS calibration screen press SETUP (
A
), SET RESERVOIR
(
B
), TDS SENSOR(
C
), then CALIBRATE (
D
) and follow the instructions on
the screen. Continue to swish the probe in the solution for three minutes.
Calibration will take about three minutes to complete.
Press FINISH (
E
) when complete.
In order to function properly, the TDS sensor needs to be
calibrated. Supplies needed: EC 1000 PPM solution, clean
water, 2 cups or containers, clean cloth.
